Winding rayon



May 23, 1950 w HENRY 2,508,516

WINDING RAYON Filed March 13, 1946 Jj'g. Z

Iii/lid l lemy Patented May 23, 1950 WINDING RAYON William V. Henry, Candler, N. 0., n-I gnor to Amer-lean Enka corporatiomlinkgltc acorporation of Delaware Application March 13, 1946, No. 653,985 5 Claims. (CL 242-43) This invention relates to the formation of thread packages and more particularly it relates to a traverse guide for depositing freshly formed viscose rayon yarn upon .a bobbin in the manner known to the art as the Pilgrim step. This socalled "Pilgrim step is produced in the prior art by mechanisms eifecting rapid stroke displacement, e. g., as described in the third paragraph of U. S. Patent No. 2,122,092 and exemplified in Figure 7 of U. S. Patent No. 2,034,404.

In collecting rayon threads and the like on rotating collecting devices, such as driven bobbins, it is necessary to guide the thread back and forth across the face of the collector in order to build up a package of controlled configuration. Traverse thread guides for accomplishing this result are well known in the rayon art. It is quite customary to vary the stroke of such thread guides for the production of packages of rayon. However, traverse thread guides having a. uniform stroke throughout the formation of the package are also utilized. A thread guide moving in a path of uniform length is utilized in the formation of a package having square ends. The present invention may be incorporated for use in connection with any of the usual traverse thread guides without regard to their use in the production of conical end packages or square end packages.

It is an object of the present invention to provide a traverse guide adapted for the winding of thread upon a bobbin or similar support in such manner that the thread is deposited thereon according to the Pllgrimstep principle.

This invention contemplates the formation of a traverse thread guide having auxiliary means thereon for effecting the deposition of thread upon a bobbin or spool according to the Pilgrim step."

It is an additional object of the present invention to provide a traverse thread guide provided with a roller at its free end, which roller is formed with a cam shaped groove around its periphery in which the thread is received for guidance to a position adjacent a collecting bobbin for deposition thereon in the undulating path followed by, the point of discharge of the thread from the roller groove. The invention further contemplates the propulsion of the grooved roller by contact with the package surface, or by contact with an intermediate roller mounted between the package and the grooved roller. Of course, the thread being drawn over the grooved roller acts to propel it and in modified forms of the inven- In allcases however, since the peripheral speed of the grooved roller is dependent on, and the same as, the take-up speed of the thread, the R. P. M. oi the grooved roller is substantially greater than the R. P. M. of the collecting bobbin whereby flie thread is deposited on the bobbin according to the Pilgrim step principle. 1. e., in an undulating path.

Other objects and advantages of this invention will be apparent from the following description when considered in connection with the accompanying drawings. wherein:

Figure 1 is an elevational view of an arm of a traverse thread guide having a cam grooved roller thread guide formed in accordance with the present invention mounted adjacent its free end;

Figure 2 is a diagrammatic illustration of a bobbin upon which yarn is being deposited by a traverse thread guide formed in accordance with one form of the present invention;

Figure 3 is a diagrammatic illustration of a modified manner of utilizing a' thread guide formed in accordance with this invention with a collecting bobbin;

Figure 4 is a diagrammatic illustration of a system in which a thread guide roller formed according to this invention is utilized in direct contact with'a. collecting bobbin;

Figure 5 is a. diagrammatic illustration of another mode for utilizing the present guide roller in conjunction with a collecting bobbin;

Figure 6 illustrates a bobbin having a single layer of yarn wound thereon according to the layup of yarn which results from the utilization of the arrangement diagrammatically illustrated in igure 2; 4

Figure 7 illustrates a bobbin having a single layer of yarn wound thereon according to the layup of yarn which results from the utilization of the arrangement diagrammatically illustrated in Figure 3;

Figure 8 illustrates a bobbin with a single layer of yarn thereon such as results from the utilization of the system diagrammatically illustrated in Figure 4: and

Figure 9 illustrates a bobbin with a single layer of yarn thereon according to the layup resulting from the use of the system diagrammatically illustrated in Figure 5.

Referring to the drawings in detail, numeral I0 designates an arm, preferably formed of glass, adapted to be secured to any of the conventional traversing guide operating mechanisms (not shown). Transverse extension I I adJacent one tion the thread only is utilized for this purpose. 66 end of the arm is provided for attachment to the asoauo l oneratingmechanisminamannershowninms.

Patent No. 2,377,784. Arm II is bent at I: adiaportion ll centitsfreeendto-formashaft which is adapted for the reception of a plastic cylindrical traversing thread guide It.

Anannularbeadltisformedonshaftsection} ll of arm II for maintaining the plastieguide It in position upon the shaft in the direction of bend it. A plastic washer n bears against the opposite sideof guide It andthe washeris iheldinpositionbymeansofasoftrubberring:

II tightly fitted over the end portion of shaft It. It will thus be seen that the cylindrical 1 traversing thread guide It is securely maintained 1 in fixed longitudinal position upon the shaft l3 1 of the traversing guide arm although it is adapted to freely rotate upon the shaft.

In each of the Figures 2-5,.inclusive, a different system for utilizing the present traversing thread guide is diagrammatically illustrated. Upon referring specifically to Figure 2 it will be' noted that bobbin I! which is driven in any of the When the invention is utilized for 4 a somewhat diiferent configuration in the yarn in its layup upon the bobbin.

Inthe simplifiedformshowninl 'lgureathe traversingthreadguideisutillzedinastilldiiferent manner from those illustrated in Figures 2 and 3. Bobbin l8 inFigure 41s rotated in a clockwise direction. Thread guide ll is closely arranged with respect to the bobbin and yarn 2| is passed over the guide and thence down and around the bobbin. In the last of'the illustrated systems of use, namely, Figure 5, the diagram includes the traversing thread guide in an arrangement similar to that shown in Figure 4 except that the thread guide It is spaced from bobbin It. In this form thread 20 is passed over traversing thread guide It and then downwardly and around the bobbin.

Figures 6-9, inclusive, illustrate bobbins with a layup of yarn thereon as obtained in the use of the systems illustrated in Figures 2-5, inclusive. The layup of yarn set forth in Figure 6 illustrates the layup produced, by the winding of the yarn according to Figure 2. The layups of yarn set forth in Figures 7-9. inclusive, illustrate the layups produced by the winding of the yarn according to the systems of Figures 3+5,

' inclusive, respectively.

conventional ways is utilized in the winding of a j 1 package being formed of continuous yarn or thread 20. the purpose for which it was primarily designed. j freshly formed plastic viscose yarn is drawnfrom an acid spinbath into which it has just beenextruded through a spinneret in the conventional manner.

Yarn 20 in its passage io the bobbin is di- 1 j rected over cylindrical traversing guide It and under an idler roller 2|, secured in position in any convenient manner. The yarn is passed-over 1 guide It while being confined within cam groove j l5 and the guide will rotate asthe yarn passes 1 thereover. As the bobbin is rotated, the yarn is j drawn from the guide and over the surface of 1 idler 2| in an undulating configuration and the yarn will be deposited upon the surface of the bobbin in accordance with the general configuration given thereto by the traversing guide.

The utilization of the guide of, this invention will produce a type of layup of yarn on a bobbin 1 similar to the type of layup produced by the well known Pilgrim step mechanism. It is to be noted, however, that succeeding comparable lengths ol' yarn are of the same configuration throughout the package being formed regardless of whether the configuration exists in the first layer of yarn upon the bobbin or in the last wound layer. present thread guide because the secondary 1 movement of the guide in effecting the undulating This result is obtainable with the yarn formation is based on the lineal travel of the yarn. Since the bobbin is increasing in size the layup will be such that the wound package will be particularly suited for the usual liquid after treatments.

In'referring specifically to Figure 3 it will be I noted that bobbin is is utilized in the winding of yarn 20. In this form as diagrammatically illustrated, traversing thread guide It is spaced from the bobbin and is rotated entirely through the medium of the yarn passing thereover. In 1 such an operation the Pilgrim stepresulting 1 from the cam groove in the roller It will produce by the cam groove of said rotatable thread guide While the use of the present traversing thread guide in each of the systems as illustrated produces all of the advantages resulting from the use of the well-known Pilgrim step" mechanism, the present guide mechanism has the advantage thereover in that'the small inertia of the guide allows a frequency of oscillation many times high er than that heretofore obtained- Furthermore, the desired efiects inthe form of the secondary movement are obtained by the rotating thread guide positioned in close proximity to the delivery point of the yarn and the mechanism is therefore comparatively simple.

What is claimed is:

;1. In an apparatus for winding threads and the like comprising a collecting device and a traverse member reciprocating lengthwise thereof including a thread guide arm, the improvement which comprises a .freely rotatable thread guide roller having an annular thread receiving cam shaped groove around its periphery, a transverse extending shaft on the thread guide arm on which the rotatable thread guide roller is mounted for reciprocation with the traverse member, means for propelling the thread guide roller at an R. P. M. substantially greater than the R. P. M. of the collecting device, whereby the cam groove of said rotatable thread guide roller delivers cylindrical cam with approximately straight-line development, a transverse extending shaft on the thread guide arm on which the rotatable thread guide roller is mounted for reciprocation with the traverse member, means for propelling the thread guide roller at an R. P. M. substantially greater than the R. P. M. of the collecting device, where- 8 roller delivers thread to the collecting device in a path defined by the relative motions of the collecting device and the traverse member superimposed by an undulating path effected by the rotation of the thread guide roller.

3. In an apparatus for winding threads and the like comprising a collecting bobbin and a traverse member reciprocating lengthwise thereof including a thread guide arm, the improvement which comprises a freely rotating plastic thread guide roller, a lateral extension on the free end of the guide arm to provide a shaft for receiving the rotating guide roller, said shaft being positioned parallel to the axis of the bobbin, and means for retaining the rotating guide roller longitudinally fixed on the shaft for reciprocation with the traverse member, the thread guide roller having a V-shaped thread receiving annular cam groove around its periphery, means for propelling the thread guide roller at an R. P. M. substantially greater than the R. P. M. of the collecting device, whereby the cam groove of said rotatable thread guide roller delivers thread to the collecting device in a path defined by the relative motions of the collecting device and the traverse member superimposed by an undulating path effected by the rotation of the thread guide roller.

4. In an apparatus for winding threads and the like comprising a collecting device and a traverse member reciprocating lengthwise thereof including a thread guide arm, the improvement which comprises a freely rotatable thread guide roller having an annular thread receiving cam shaped groove around its periphery, a transverse extending shaft on the thread guide arm on which the rotatable thread guide is mounted for reciprocation with the traverse member, means for propelling the thread guide roller at an R. P. M. substantially greater than the R. P. M. of the collecting device, whereby the cam groove of said ro- 6 tatable threadguide roller delivers thread to the collecting device in a path defined by the relative motions of the collecting device and the traverse member superimposed by an undulating path effected by the rotation of the thread guide roller.

5. In an apparatus for winding threads and the like comprising a collecting device and a traverse member reciprocating lengthwise thereof including a thread guide arm, the improvement which comprises a freely rotatable thread guide roller having an annular thread receiving groove around its periphery, said groove constituting a cylindrical cam with approximately straight-line development, a transverse extending shaft on the thread guide arm on which the rotatable thread guide roller is mounted for reciprocation with the traverse member, means for propelling the thread guide roller at an R. P. M. substantially greater than the R. P. M. of the collecting device, whereby the cam groove of said rotatable thread guide roller delivers thread to the collecting device in a path defined by the relative motions of the collecting device and the traverse member superimposed by an undulating path efi'ected by the rotation of the thread guide roller.

WILLIAM V. HENRY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain Aug. 23, 1888 

